@$@#$! My favourite case I've seen so far on the internet is the Incipio Feather and I've ordered one for my iPhone 3G S (which I'm getting this coming Friday). Would you advise against using it then if it scratches the case? Are you sure you didn't clean it out and there was dirt trapped inside which scratched it?
I'm pretty disappointed if the Feather doesn't prevent but causes scratches. It's the only case that provides protection with next to no bulk and keeps the iPhone's slim figure.
No, no, no....It did not so much scratch the case but the way it is designed there are 2 parallel lines going up the inside of the case, not very noticable, but there, and those left 2 marks along the back of the phone....If you just looked at the phone you probably wouldn't see it but if you were LOOKING FOR scratches or marks, then you would notice it.
I would def use feather again as it's an excellent case.
Mine is 2 months old and had to email them about a replacement because I noticed a small crack in the case under the volume buttons.
Def worth the $20 they charge for it...well I got one on ebay for $17 through let_me_sell_that_for_you ebayer